docs: def sync_unwanted(database):
      """Context manager for preventing unwanted sync queries.
      `UnwantedSyncQueryError` exception will raise on such query.
  
      NOTE: sync_unwanted() context manager is **deprecated**, use
      database's `.allow_sync()` context manager or `Manager.allow_sync()`
      context manager.
      """
      warnings.warn("sync_unwanted() context manager is deprecated, "
                    "use database's `.allow_sync()` context manager or "
                    "`Manager.allow_sync()` context manager. ",
                    DeprecationWarning)
      old_allow_sync = database._allow_sync
      database._allow_sync = False
      yield
      database._allow_sync = old_allow_sync